<template>
  <section>
    <!--工具条-->
    <el-col :span="24" class="toolbar" style="padding-bottom: 0px;">
      <el-form :inline="true">
        <el-form-item >
          <el-input v-model="keyword" placeholder="请输入关键字"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" v-on:click="keywordQuery">查询</el-button>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="handleAdd">新增</el-button>
        </el-form-item>
      </el-form>
    </el-col>

    <!--列表-->
    <el-table :data="menus" highlight-current-row v-loading="listLoading" @selection-change="selsChange" style="width: 100%;">
      <el-table-column type="selection" width="55">
      </el-table-column>
      <el-table-column type="index" width="60">
      </el-table-column>
      <el-table-column prop="name" label="菜单名称" width="150">
      </el-table-column>
      <el-table-column prop="component" label="菜单组件路径" width="200">
      </el-table-column>
      <el-table-column prop="url" label="访问路径" width="200">
      </el-table-column>
      <el-table-column prop="icon" label="图标" min-width="100">
      </el-table-column>
      <el-table-column prop="parent.name" label="父级菜单" min-width="100">
      </el-table-column>
      <el-table-column prop="state" label="状态" width="60">
        <template scope="scope">
          <span v-if="scope.row.state==1" style="color: #11b95c">启用</span>
          <span v-else style="color: gray">禁用</span>
        </template>
      </el-table-column>
      <el-table-column label="操作">
        <template scope="scope">
          <el-button size="small" @click="handlesave(scope.$index, scope.row)">编辑</el-button>
          <el-button type="danger" size="small" @click="handleDel(scope.$index, scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!--工具条-->
    <el-col :span="24" class="toolbar">
      <el-button type="danger" @click="batchRemove" :disabled="this.sels.length===0">批量删除</el-button>
      <el-pagination layout="prev, pager, next" @current-change="handleCurrentChange"
                     :page-size="pageSize" :current-page="currentPage" :total="totals" style="float:right;">
      </el-pagination>
    </el-col>

    <!--
      :visible.sync="saveFormVisible" - 控制对话框是否显示，默认false不显示，点击按钮
      :close-on-click-modal="false" - 点击对话框外面不关闭
      label-width="80px" - 标题宽度
      :rules="saveFormRules" - 表单项验证
      ref="saveForm" - 表单验证
     -->
    <!--新增界面-->
    <el-dialog :title="title" :visible.sync="saveFormVisible" :close-on-click-modal="false">
      <el-form :model="saveForm" label-width="80px" :rules="saveFormRules" ref="saveForm">
        <el-form-item label="菜单名称" prop="name">
          <el-input v-model="saveForm.name" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="菜单组件路径" prop="component">
          <el-input v-model="saveForm.component" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="访问URL" prop="url">
          <el-input v-model="saveForm.url" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="图标" prop="icon">
          <el-input v-model="saveForm.icon" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="排序" prop="index">
          <el-input v-model="saveForm.index" auto-complete="off"></el-input>
        </el-form-item>
        
        <el-form-item label="上级菜单">
          <!-- 级联框：
             :options="menuTree" - 数据 - 无限极树- 集合
             label:'name' - 回显哪一个属性值
             value:'id' - 传值，将id传递给v-model="saveForm.parentId"
          -->
          <el-cascader v-model="saveForm.parentId"
                       :options="menuTree"
                       :props="{ checkStrictly: true,label:'name',value:'id'}"
                       clearable></el-cascader>
        </el-form-item>

        <el-form-item label="状态">
          <el-radio-group v-model="saveForm.state">
            <el-radio class="radio" :label="1">启用</el-radio>
            <el-radio class="radio" :label="0">禁用</el-radio>
          </el-radio-group>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click.native="saveFormVisible = false">取消</el-button>
        <el-button type="primary" @click.native="saveSubmit" :loading="saveLoading">提交</el-button>
      </div>
    </el-dialog>
  </section>
</template>

<script>


export default {
  data() {
    return {
      menus: [],      //列表数据，回调函数中给它赋值
      listLoading: false,   //加载框
      currentPage: 1,       //当前页
      pageSize: 5,          //每页显示的条数
      totals: 0,            //总数量
      // 高级查询
      keyword: '',
      // 批量删除
      sels: [],//列表选中列, 批量操作
      // 添加和修改的数据
      saveFormVisible: false,//编辑界面是否显示
      title: '',
      saveLoading: false,
      // 验证规则
      saveFormRules: {
        name: [
          {required: true, message: '请输入菜单名称', trigger: 'blur'}
        ],
        component: [
          {required: true, message: '组件路径', trigger: 'blur'}
        ],
        url: [
          {required: true, message: '访问URL', trigger: 'blur'}
        ]
      },
      // 对话框的数据
      saveForm: {
        id: null,
        name: '',
        component: '',
        url: '',
        icon: '',
        index: null,
        parentId: null,
        state: 1
      },
      // 保存菜单树
      menuTree: [],
      // 获取上级菜单
      parent: []
    }
  },

  methods: {
    //1.分页查询 - 获取菜单列表
    getMenus() {
      //组装参数
      let paras = {
        currentPage: this.currentPage,
        pageSize: this.pageSize,
        keyword: this.keyword
      };
      //显示加载框
      this.listLoading = true;
      //使用axios发送分页请求
      this.$http.post("/menu", paras).then(res => {
        this.menus = res.data.data;
        this.totals = res.data.totals;
        this.listLoading = false;
      }).catch(res => {
        this.$message.error("系统繁忙，请稍后重试!!!");
      });
    },

    //2.分页查询 - 点击分页栏触发方法
    handleCurrentChange(val) {
      this.currentPage = val;
      this.getMenus();
    },

    // 3. 高级查询
    keywordQuery() {
      // 将当前页码设置为1，不然会出现BUG
      this.currentPage = 1;
      this.getMenus();
    },


    // 4. 删除
    handleDel: function (index, row) {
      this.$confirm('确认删除该记录吗?', '提示', {
        type: 'warning'
      }).then(() => {
        this.listLoading = true;
        //NProgress.start();
        this.$http.delete("/menu/" + row.id).then(res => {
          if (res.data.success) {
            let totalPage = Math.ceil(this.totals / this.pageSize)
            if (this.currentPage == totalPage && (this.totals - 1) % this.pageSize == 0 && this.currentPage != 1) {
              this.currentPage = this.currentPage - 1;
            }
            this.getMenus();
          } else {
            this.$message.error("系统繁忙");
          }
          this.listLoading = false;
        }).catch(res => {
          this.$message.error("系统繁忙");
        })
      }).catch(() => {
      });
    },
    // 选项改变的时候触发：参数时每一个选中的对象
    selsChange: function (sels) {
      this.sels = sels;
    },
    // 5. 批量删除
    batchRemove: function () {
      var ids = this.sels.map(item => item.id);
      this.$confirm('确认删除选中记录吗？', '提示', {
        type: 'warning'
      }).then(() => {
        this.listLoading = true;
        this.$http.patch("/menu", ids).then(res => {
          if (res.data.success) {
            this.currentPage = 1;
            this.getMenus();
          } else {
            this.$message.error("系统繁忙")
          }
          this.listLoading = false;
        }).catch(res => {
          this.$message.error("系统繁忙400")
        })
      }).catch(() => {
      });
    },


    //显示编辑界面
    handlesave: function (index, row) {
      this.title = "编辑";
      this.saveForm = Object.assign({}, row);
      // 加载上级部门
      this.getParents()
      // 加载菜单树
      this.getMenuTree();
      this.saveFormVisible = true;
    },
    //点击新增按钮弹出对话框
    handleAdd: function () {
      this.title = "新增";
      this.saveForm = {
        id: null,
        name: '',
        component: '',
        url: '',
        icon: '',
        index: null,
        parentId: null,
        state: 1
      };
      // 加载上级部门
      this.getParents()
      // 加载菜单树
      this.getMenuTree();
      //弹出对话框
      this.saveFormVisible = true;
    },

    // 点击添加或修改的提交按钮提交数据
    saveSubmit: function () {
      this.$refs.saveForm.validate((valid) => {
        if (valid) {
          this.$confirm('确认提交吗？', '提示', {}).then(() => {
            this.saveLoading = true;
            // 提交数据时上级菜单数据格式做处理
            // console.log(this.saveForm.parentId);
            let result = this.saveForm.parentId;
            if (result == null || result.length == 0) {
              this.saveForm.parentId = null;
            }
            if (result.length){
              this.saveForm.parentId = result[result.length-1];
            }else {
              this.saveForm.parentId = result;
            }

            this.$http.put("/menu", this.saveForm).then(res => {
              if (res.data.success) {
                this.getMenus();
              } else {
                this.$message.error("系统繁忙500")
              }
              this.saveLoading = false;
            }).catch(res => {
              this.$message.error("系统繁忙404")
              this.saveLoading = false;
            })
            // 关闭对话框
            this.saveFormVisible = false;
          });
        }
      });
    },

    getMenuTree(){
      this.$http.get("/menu/menuTree").then(res=>{
        this.menuTree = res.data;
      })
    },
    getParents() {
      this.$http.get("/menu").then(res=>{
        this.parent = res.data;
      })
    }
},
      mounted() {
        this.getMenus();

      }
    }


</script>

<style scoped>

</style>